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Finding the Fourth Proportional to 61,681.78, 85,120.78 and 33,387.40

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Solution

The fourth proportional to 61,681.78, 85,120.78 and 33,387.40 is: 46,074.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,681.78 : 85,120.78 = 33,387.40 : x
  2. Step 2: Convert to fraction form
    61,681.78/85,120.78 = 33,387.40/x
  3. Step 3: Cross multiply
    61,681.78x = 85,120.78 × 33,387.40
  4. Step 4: Simplify right side
    61,681.78x = 2,841,961,530.17
  5. Step 5: Solve for x
    x = 2,841,961,530.17/61,681.78
  6. Step 6: Final answer
    x = 46,074.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.